These uni-ball&reg; Jetstream Retractable Pen Refills come with blue ink and are ideal for use in uni-ball&reg; Jetstream ballpoint pens.Featuring a unique hybrid ink, uni-ball® Jetstream Retractable Pen Refills offer the smoothness of a gel pen with the quick-drying properties of a ballpoint. Each rollerball refill is filled with deep-pigment blue pen ink for strong lines with minimal hand pressure. This skip-free uni-ball® refill is always consistent and dependable.

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At first we used to throw out these pens. But now happily they can be refilled. Note when the refill comes out of the pack you need to take off the blue plastic end cap or the pen will not retract. Basically make the new one look like what you pull out that is empty.

These are actually refills for the Jetstream pens that have a cap. But they are easily converted: you just unscrew the blue cap and they can be used with the retractable pen. I love these pens. I'm a lefty and they work very well for me. The best pen.

Have used jet stream pens since they were first on the market. Love the smoothness they deliver in any price level of pens, including Cross and Mont Blanc. So glad they make in a retractable version so that I don't lose the cap.